Quarterly report pursuant to Section 13 or 15(d)

Postretirement Benefits (Details)

v3.19.3
Postretirement Benefits (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Defined Benefit Plan Disclosure [Line Items]        
Settlement Loss $ 294.1 $ 0.0 $ 294.1 $ 0.0
Pension Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest Cost 0.7 5.8 5.9 17.2
Expected Return on Plan Assets (0.6) (6.4) (7.4) (19.1)
Amortization of Prior Service Credits 0.0 0.0 0.0 0.0
Amortization of Net Actuarial Losses 0.6 2.6 5.7 7.7
Settlement Loss 294.1 0.0 294.1 0.0
Net Pension and Other Benefit Costs 294.8 2.0 298.3 5.8
Other Postretirement Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest Cost 0.3 0.3 0.9 0.8
Expected Return on Plan Assets 0.0 0.0 0.0 0.0
Amortization of Prior Service Credits (0.1) (0.2) (0.5) (0.5)
Amortization of Net Actuarial Losses 0.0 0.0 0.0 0.0
Settlement Loss 0.0 0.0 0.0 0.0
Net Pension and Other Benefit Costs 0.2 $ 0.1 0.4 0.3
Qualified Plan [Member] | Pension Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Company Contributions     3.5 160.0
Nonqualified Plan [Member] | Pension Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Company Contributions     3.3 $ 2.7
Brunswick Pension Plan For Salaried Employees and Brunswick Pension Plan For Hourly Bargaining Unit Employees [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement     672.9  
Defined Benefit Plan Lump Sum Payment     77.1  
Defined Benefit Plan, Purchase of Group Annuity Contract     595.8  
Settlement Loss $ 294.1   $ 294.1